@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;700;800&family=Orbitron:wght@600;800;900&display=swap');

:root {
  --primary: #10b981;
  --primary-glow: rgba(16, 185, 129, 0.4);
  --primary-dark: #059669;
  --accent-cyan: #06b6d4;
  --accent-gold: #f59e0b;
  --accent-red: #ef4444;
  --bg-main: #020617;
  --bg-card: rgba(15, 23, 42, 0.75);
  --border-card: rgba(148, 163, 184, 0.15);
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --font-main: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --font-display: 'Orbitron', sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  min-width: 320px;
  min-height: 100vh;
  background-color: var(--bg-main);
  color: var(--text-main);
  font-family: var(--font-main);
  line-height: 1.5;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ========================================================
   LANDING PAGE LAYOUT & VIDEO BG
   ======================================================== */
.app {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding: 1rem;
}

.video-background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  object-fit: cover;
  z-index: -2;
  background: radial-gradient(circle at 15% 10%, rgba(29, 78, 216, 0.15), transparent 55%),
              radial-gradient(circle at 85% 15%, rgba(20, 184, 166, 0.15), transparent 55%),
              linear-gradient(135deg, #020617, #0b1224);
}

.yellow-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  background: radial-gradient(circle at 0 0, rgba(34, 197, 94, 0.08), transparent 55%),
              radial-gradient(circle at 100% 100%, rgba(56, 189, 248, 0.08), transparent 55%),
              rgba(2, 6, 23, 0.85);
  pointer-events: none;
}

.app-content {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  z-index: 1;
}

/* ========================================================
   TOP SECURITY BAR
   ======================================================== */
.security-warning {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.5rem 0.75rem;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(34, 197, 94, 0.25);
  border-radius: 999px;
  padding: 0.5rem 1.25rem;
  font-size: 0.82rem;
  margin: 0.5rem auto 1.5rem auto;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4), inset 0 0 12px rgba(34, 197, 94, 0.08);
}

.security-info-label {
  color: var(--text-muted);
  font-weight: 500;
}

.security-info-value {
  color: #38bdf8;
  font-weight: 700;
  font-family: var(--font-mono);
}

.security-info-danger {
  color: #4ade80 !important;
}

.security-info-separator {
  color: rgba(148, 163, 184, 0.4);
}

.security-info-license a {
  color: #fbbf24;
  text-decoration: none;
  font-weight: 600;
  transition: color 0.2s;
}

.security-info-license a:hover {
  color: #fef08a;
  text-shadow: 0 0 8px rgba(251, 191, 36, 0.6);
}

/* ========================================================
   CODE MANAGER MAIN CARD
   ======================================================== */
.code-manager {
  background: rgba(15, 23, 42, 0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: 24px;
  padding: 2rem;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.hacker-header-title {
  text-align: center;
  margin-bottom: 1rem;
}

.glitch-title {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 900;
  letter-spacing: 2px;
  background: linear-gradient(135deg, #10b981, #06b6d4, #a7f3d0);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 25px rgba(16, 185, 129, 0.4);
  position: relative;
  display: inline-block;
}

.code-manager-title {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  background: rgba(2, 6, 23, 0.5);
  border: 1px dashed rgba(34, 197, 94, 0.3);
  border-radius: 14px;
  padding: 0.85rem 1.25rem;
  margin-bottom: 1.5rem;
}

.code-manager-title-line {
  color: #cbd5e1;
  font-size: 0.92rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Form row */
.code-manager-fields {
  margin-bottom: 1.75rem;
}

.input-action-row {
  display: flex;
  gap: 0.75rem;
  align-items: stretch;
}

.form-group {
  flex: 1;
}

.code-input {
  width: 100%;
  height: 100%;
  min-height: 52px;
  background: rgba(2, 6, 23, 0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(148, 163, 184, 0.25);
  border-radius: 12px;
  padding: 0 1.25rem;
  color: #f8fafc;
  font-size: 1.05rem;
  font-family: var(--font-main);
  outline: none;
  transition: all 0.25s;
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.4);
}

.code-input:focus {
  border-color: #22c55e;
  box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.25), inset 0 2px 4px rgba(0, 0, 0, 0.4);
}

.code-input::placeholder {
  color: #64748b;
}

.btn-delete-code {
  min-height: 52px;
  padding: 0 1.5rem;
  border-radius: 12px;
  border: none;
  font-weight: 800;
  font-size: 0.98rem;
  color: #022c16;
  background: linear-gradient(135deg, #06b6d4, #22c55e);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 8px 25px rgba(34, 197, 94, 0.35), 0 4px 10px rgba(6, 182, 212, 0.2);
  white-space: nowrap;
}

.btn-delete-code:hover:not(:disabled) {
  transform: translateY(-2px);
  filter: brightness(1.1);
  box-shadow: 0 12px 30px rgba(34, 197, 94, 0.5), 0 6px 15px rgba(6, 182, 212, 0.3);
}

.btn-delete-code:active:not(:disabled) {
  transform: translateY(0);
}

.btn-delete-code:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* ========================================================
   BANNERS GRID & LLWIN FIRST
   ======================================================== */
.code-manager-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.grid-item {
  position: relative;
  border-radius: 14px;
  overflow: hidden;
  border: 2px solid rgba(148, 163, 184, 0.2);
  background: rgba(2, 6, 23, 0.6);
  padding: 0;
  cursor: pointer;
  aspect-ratio: 16 / 9;
  transition: all 0.25s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.grid-item:hover {
  border-color: rgba(34, 197, 94, 0.6);
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.5);
}

.grid-item.active {
  border-color: #22c55e !important;
  box-shadow: 0 0 0 2px rgba(34, 197, 94, 0.4), 0 10px 25px rgba(34, 197, 94, 0.35);
}

.grid-item.active::after {
  content: '✓ ĐANG CHỌN';
  position: absolute;
  bottom: 6px;
  right: 6px;
  background: #22c55e;
  color: #022c16;
  font-size: 0.65rem;
  font-weight: 900;
  padding: 2px 6px;
  border-radius: 6px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}

.grid-item-llwin {
  border: 2px solid rgba(59, 130, 246, 0.75) !important;
  box-shadow: 0 0 20px rgba(37, 99, 235, 0.35);
}

.grid-item-llwin.active {
  border-color: #60a5fa !important;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.5), 0 10px 30px rgba(37, 99, 235, 0.45) !important;
}

.grid-item-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s;
}

.grid-item:hover .grid-item-image {
  transform: scale(1.04);
}

/* ========================================================
   HACKER TERMINAL SCANNING OVERLAY
   ======================================================== */
.hacker-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(2, 6, 23, 0.94);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.hacker-terminal {
  width: 100%;
  max-width: 650px;
  background: #050b14;
  border: 1px solid #10b981;
  border-radius: 16px;
  box-shadow: 0 0 40px rgba(16, 185, 129, 0.35), inset 0 0 20px rgba(16, 185, 129, 0.1);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.hacker-header {
  background: rgba(16, 185, 129, 0.15);
  border-bottom: 1px solid rgba(16, 185, 129, 0.3);
  padding: 0.85rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.hacker-header .glitch {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 1rem;
  color: #34d399;
  letter-spacing: 2px;
}

.hacker-progress {
  padding: 1rem 1.25rem;
  background: rgba(0, 0, 0, 0.4);
  border-bottom: 1px solid rgba(148, 163, 184, 0.1);
  display: flex;
  align-items: center;
  gap: 1rem;
}

.hacker-progress-bar-wrap {
  flex: 1;
  height: 10px;
  background: rgba(148, 163, 184, 0.15);
  border-radius: 5px;
  overflow: hidden;
}

.hacker-progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #06b6d4, #10b981, #34d399);
  transition: width 0.3s ease;
  box-shadow: 0 0 12px rgba(16, 185, 129, 0.8);
}

.hacker-progress-text {
  font-family: var(--font-mono);
  font-weight: 800;
  color: #34d399;
  min-width: 48px;
  text-align: right;
}

.hacker-body {
  padding: 1.25rem;
  min-height: 220px;
  max-height: 320px;
  overflow-y: auto;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.hacker-line {
  color: #94a3b8;
  opacity: 0;
  transform: translateX(-6px);
  animation: lineIn 0.25s forwards;
}

.hacker-line::before {
  content: '>';
  color: #10b981;
  margin-right: 8px;
  font-weight: 900;
}

@keyframes lineIn {
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* ========================================================
   MODAL DIALOGS (CODE & RESULT)
   ======================================================== */
.result-modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 1050;
  background: rgba(2, 6, 23, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
  animation: fadeIn 0.2s ease;
}

.result-modal {
  width: 100%;
  max-width: 540px;
  background: #0b1329;
  border: 1px solid rgba(148, 163, 184, 0.25);
  border-radius: 20px;
  padding: 1.75rem;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.8), 0 0 30px rgba(16, 185, 129, 0.2);
  display: flex;
  flex-direction: column;
  animation: scaleUp 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.result-modal.modal-safe {
  border-color: rgba(34, 197, 94, 0.6);
  box-shadow: 0 0 35px rgba(34, 197, 94, 0.3);
}

.result-modal.modal-infected {
  border-color: rgba(239, 68, 68, 0.6);
  box-shadow: 0 0 35px rgba(239, 68, 68, 0.3);
}

.result-status {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 1rem;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.result-status.success {
  color: #34d399;
}

.result-status.warning {
  color: #fbbf24;
}

.result-status.error {
  color: #f87171;
}

.result-text {
  color: #e2e8f0;
  font-size: 0.95rem;
  line-height: 1.6;
  white-space: pre-line;
  background: rgba(2, 6, 23, 0.6);
  border: 1px solid rgba(148, 163, 184, 0.12);
  border-radius: 12px;
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}

.btn-close {
  min-height: 48px;
  border-radius: 10px;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.2s;
  padding: 0 1.25rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  text-decoration: none;
}

.btn-modal-cancel {
  background: rgba(148, 163, 184, 0.12);
  color: #cbd5e1;
  border: 1px solid rgba(148, 163, 184, 0.25);
  flex: 1;
}

.btn-modal-cancel:hover {
  background: rgba(148, 163, 184, 0.2);
  color: #fff;
}

.btn-modal-confirm {
  background: linear-gradient(135deg, #10b981, #22c55e);
  color: #022c16;
  border: none;
  flex: 1;
  font-weight: 800;
  box-shadow: 0 4px 15px rgba(34, 197, 94, 0.4);
}

.btn-modal-confirm:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
}

.btn-modal-llwin {
  background: linear-gradient(135deg, #1e3a8a, #1e40af, #2563eb);
  color: #ffffff !important;
  border: 1px solid rgba(96, 165, 250, 0.35);
  width: 100%;
  font-weight: 800;
  font-size: 0.95rem;
  margin-bottom: 0.85rem;
  padding: 0.9rem 1.25rem;
  border-radius: 12px;
  text-align: center;
  justify-content: center;
  align-items: center;
  text-decoration: none;
  display: flex;
  gap: 0.5rem;
  line-height: 1.4;
  letter-spacing: 0.3px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 6px 22px rgba(30, 58, 138, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.15);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  animation: subtlePulse 3.5s ease-in-out infinite;
}

.btn-modal-llwin::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -60%;
  width: 50%;
  height: 200%;
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0) 0%,
    rgba(255, 255, 255, 0.18) 50%,
    rgba(255, 255, 255, 0) 100%
  );
  transform: rotate(25deg);
  animation: shimmerSweep 4s infinite;
  pointer-events: none;
}

.btn-modal-llwin:hover {
  transform: translateY(-2px);
  background: linear-gradient(135deg, #1d4ed8, #2563eb, #3b82f6);
  border-color: rgba(147, 197, 253, 0.6);
  box-shadow: 0 10px 28px rgba(37, 99, 235, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.25);
  filter: none;
}

.btn-modal-llwin:active {
  transform: translateY(0);
}

@keyframes subtlePulse {
  0%, 100% {
    box-shadow: 0 6px 20px rgba(30, 58, 138, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.15);
    border-color: rgba(96, 165, 250, 0.3);
  }
  50% {
    box-shadow: 0 8px 26px rgba(37, 99, 235, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.25);
    border-color: rgba(96, 165, 250, 0.55);
  }
}

@keyframes shimmerSweep {
  0% {
    left: -70%;
  }
  30%, 100% {
    left: 140%;
  }
}

/* ========================================================
   ADMIN DASHBOARD STYLING
   ======================================================== */
.admin-body {
  background: #0a0f1d;
  color: #e2e8f0;
}

.admin-header {
  background: #0f172a;
  border-bottom: 1px solid rgba(148, 163, 184, 0.12);
  padding: 0.85rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
}

.admin-header-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.admin-header-brand h1 {
  font-size: 1.25rem;
  font-weight: 800;
  color: #f8fafc;
}

.admin-header-brand .badge-admin {
  background: #10b981;
  color: #022c16;
  font-size: 0.7rem;
  font-weight: 800;
  padding: 2px 8px;
  border-radius: 6px;
}

.admin-header-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.admin-nav-btn {
  background: transparent;
  color: #94a3b8;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.admin-nav-btn:hover {
  color: #f8fafc;
  background: rgba(148, 163, 184, 0.1);
}

.admin-nav-btn.active {
  color: #10b981;
  background: rgba(16, 185, 129, 0.12);
  border-color: rgba(16, 185, 129, 0.3);
}

.admin-container {
  max-width: 1200px;
  margin: 1.75rem auto;
  padding: 0 1.5rem 3rem 1.5rem;
}

/* Stat Grid */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: #111c35;
  border: 1px solid rgba(148, 163, 184, 0.12);
  border-radius: 16px;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.stat-title {
  color: #94a3b8;
  font-size: 0.85rem;
  font-weight: 600;
}

.stat-value {
  font-size: 1.8rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: #f8fafc;
}

/* Card Sections */
.admin-card {
  background: #111c35;
  border: 1px solid rgba(148, 163, 184, 0.12);
  border-radius: 16px;
  padding: 1.75rem;
  margin-bottom: 2rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.admin-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid rgba(148, 163, 184, 0.1);
}

.admin-card-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: #f8fafc;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Form Styles */
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.admin-label {
  display: block;
  color: #cbd5e1;
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.admin-input, .admin-select {
  width: 100%;
  background: #090e1a;
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 10px;
  padding: 0.65rem 1rem;
  color: #f8fafc;
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s;
}

.admin-input:focus, .admin-select:focus {
  border-color: #10b981;
  box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2);
}

.btn-admin-primary {
  background: linear-gradient(135deg, #10b981, #059669);
  color: #ffffff;
  border: none;
  border-radius: 10px;
  padding: 0.7rem 1.4rem;
  font-weight: 700;
  font-size: 0.92rem;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-admin-primary:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
}

.btn-admin-danger {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.3);
  border-radius: 8px;
  padding: 0.4rem 0.75rem;
  font-weight: 600;
  font-size: 0.82rem;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-admin-danger:hover {
  background: rgba(239, 68, 68, 0.25);
  color: #ef4444;
}

.btn-admin-secondary {
  background: rgba(148, 163, 184, 0.12);
  color: #cbd5e1;
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 8px;
  padding: 0.4rem 0.75rem;
  font-weight: 600;
  font-size: 0.82rem;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-admin-secondary:hover {
  background: rgba(148, 163, 184, 0.2);
  color: #fff;
}

/* Data Table */
.table-responsive {
  width: 100%;
  overflow-x: auto;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

.admin-table th {
  background: rgba(2, 6, 23, 0.5);
  color: #94a3b8;
  font-weight: 700;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid rgba(148, 163, 184, 0.15);
}

.admin-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid rgba(148, 163, 184, 0.08);
  color: #cbd5e1;
}

.admin-table tr:hover td {
  background: rgba(148, 163, 184, 0.04);
}

/* Status Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-safe {
  background: rgba(16, 185, 129, 0.18);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.4);
}

.badge-infected {
  background: rgba(239, 68, 68, 0.18);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.4);
}

.badge-unused {
  background: rgba(56, 189, 248, 0.15);
  color: #38bdf8;
  border: 1px solid rgba(56, 189, 248, 0.35);
}

.badge-used {
  background: rgba(148, 163, 184, 0.15);
  color: #94a3b8;
  border: 1px solid rgba(148, 163, 184, 0.25);
}

/* Filter Bar */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  align-items: center;
  justify-content: space-between;
}

.filter-left {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  flex: 1;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.toast {
  background: #0f172a;
  border: 1px solid rgba(148, 163, 184, 0.25);
  border-radius: 12px;
  padding: 0.85rem 1.25rem;
  color: #f8fafc;
  font-size: 0.9rem;
  font-weight: 600;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  animation: slideInRight 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.toast.success {
  border-color: #10b981;
}

.toast.error {
  border-color: #ef4444;
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes scaleUp {
  from { opacity: 0; transform: scale(0.92); }
  to { opacity: 1; transform: scale(1); }
}

/* ========================================================
   RESPONSIVE DESIGN
   ======================================================== */
@media (max-width: 768px) {
  .app {
    padding: 0.5rem;
  }
  .code-manager {
    padding: 1.25rem;
    border-radius: 18px;
  }
  .glitch-title {
    font-size: 1.45rem;
  }
  .input-action-row {
    flex-direction: column;
  }
  .btn-delete-code {
    width: 100%;
  }
  .code-manager-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.6rem;
  }
  .admin-header {
    padding: 0.75rem 1rem;
    flex-direction: column;
    gap: 0.75rem;
    align-items: flex-start;
  }
  .admin-header-nav {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 0.25rem;
  }
  .stat-grid {
    grid-template-columns: 1fr;
  }
  .security-warning {
    font-size: 0.72rem;
    padding: 0.4rem 0.85rem;
  }
}